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From: "yann at droneaud dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/109183] [regression?] since GCC 11.1, -MM -MMD
 generates "a-" prefixed dependency files
Date: Mon, 27 Mar 2023 17:23:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109183

--- Comment #4 from Yann Droneaud <yann at droneaud dot fr> ---
(In reply to Alexandre Oliva from comment #3)
> dump files now consistently take the base name from the output name, when
> not overridden
>=20
> since in this case gcc is called for (compiling and) linking, and the fin=
al
> output name is a.* (.out or .exe, depending on the platform),

That the issue at hand, `gcc -MM -MMD test.c` does not compile nor link
anything: it preprocess and extract dependencies, nothing more. Thus using
"a.out" as the output is not expected.=